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Finding the Fourth Proportional to 1,866.79, 2,797.08 and 1,316.40

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Solution

The fourth proportional to 1,866.79, 2,797.08 and 1,316.40 is: 1,972.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.79 : 2,797.08 = 1,316.40 : x
  2. Step 2: Convert to fraction form
    1,866.79/2,797.08 = 1,316.40/x
  3. Step 3: Cross multiply
    1,866.79x = 2,797.08 × 1,316.40
  4. Step 4: Simplify right side
    1,866.79x = 3,682,076.11
  5. Step 5: Solve for x
    x = 3,682,076.11/1,866.79
  6. Step 6: Final answer
    x = 1,972.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.